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    1   /*
    2    * Copyright (c) 1997, 2004, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   
   26   package javax.swing;
   27   
   28   import java.beans;
   29   import java.lang.reflect;
   30   import java.awt.Image;
   31   
   32   /**
   33    * The superclass for all Swing BeanInfo classes.  It provides
   34    * default implementations of <code>getIcon</code> and
   35    * <code>getDefaultPropertyIndex</code> as well as utility
   36    * methods, like createPropertyDescriptor, for writing BeanInfo
   37    * implementations.  This classes is intended to be used along
   38    * with <code>GenSwingBeanInfo</code> a BeanInfo class code generator.
   39    *
   40    * @see GenSwingBeanInfo
   41    * @author Hans Muller
   42    */
   43   public class SwingBeanInfoBase extends SimpleBeanInfo
   44   {
   45       /**
   46        * The default index is always 0.  In other words the first property
   47        * listed in the getPropertyDescriptors() method is the one
   48        * to show a (JFC builder) user in a situation where just a single
   49        * property will be shown.
   50        */
   51       public int getDefaultPropertyIndex() {
   52           return 0;
   53       }
   54   
   55       /**
   56        * Returns a generic Swing icon, all icon "kinds" are supported.
   57        * Subclasses should defer to this method when they don't have
   58        * a particular beans icon kind.
   59        */
   60       public Image getIcon(int kind) {
   61           // PENDING(hmuller) need generic swing icon images.
   62           return null;
   63       }
   64   
   65       /**
   66        * Returns the BeanInfo for the superclass of our bean, so that
   67        * its PropertyDescriptors will be included.
   68        */
   69       public BeanInfo[] getAdditionalBeanInfo() {
   70           Class superClass = getBeanDescriptor().getBeanClass().getSuperclass();
   71           BeanInfo superBeanInfo = null;
   72           try {
   73               superBeanInfo = Introspector.getBeanInfo(superClass);
   74           } catch (IntrospectionException ie) {}
   75           if (superBeanInfo != null) {
   76               BeanInfo[] ret = new BeanInfo[1];
   77               ret[0] = superBeanInfo;
   78               return ret;
   79           }
   80           return null;
   81       }
   82   }

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